Visibility

Mercury crossed the disc of the Sun on 1973 November 10th.
The map above shows the visibility of the transit.

Geocentric Circumstances

The geocentric circumstances of the transit are shown in the diagram to the
right. During the transit, the diameter of the Sun was 1938.5 arcseconds and
that of Mercury was 10.0 arcseconds. In other words, the diameter of Mercury
was 0.005 that of the Sun, making it look like a very small, rapidly moving
sunspot. The whole transit lasted five and a half hours.

The minimum separation between the centre of the solar disc and Mercury was
26.4 arcseconds.